Adjustable chimney spark arrester



Fly 2 [mentors Samuel Laffrey Stanley A. Laffrey y My a Attorneys S A LAFFREY ETAL ADJUSTABLE CHIMNEY SPARK ARRESTER oooooooooooog l4- April 25, 1950 Filed Sept. 26, 1947 Patented Apr. 25, 1950 r ADJUSTABLE CHIMNEY SPARK ARRESTER Samuel A. Lafirey and Stanley A. Lafirey, Detroit,

Mich.

Application September 26, 1947, Serial No. 776,200

3 Claims. (Cl. 183-51) ihis invention comprises novel and useful improvements in an adjustable chimney spark arrester and more specifically pertains to a cage or guard of screening which may be readily applied to the opening of a chimney for preventing the egress of sparks therefrom.

The principal object of this invention resides in providing a spark arrester which may be quickly and easily applied to a chimney for effectively preventing the dangerous discharge of sparks or burning particles therefrom.

An important feature of the invention resides in providing a spark arrester in accordance with the preceding object, which may be constructed of light weight screening and yet so designed as to provide the necessary strength and rigidity; which may be readily adapted to various sizes and shapes of chimneys; which may be quickly and easily installed thereto; and which is readily cap-able of adjustment as to size for accommodating the device to a variety of sizes and shapes of chimneys.

These, together with various ancillary objects of the invention which will later become apparent as the following description proceeds, are attained by this device, a preferred embodiment of which has been illustrated, by way of example only in the accompanying drawings, wherein- Figure l is a perspective view illustrating the manner of assembling the same and applying the same to a chimney;

Figure 2 is a top plan view of the spark arrester with its top sections in closed position;

Figure 3 is a horizontal sectional View taken substantially upon the plane of the section line 3-3 of Figure 1 and illustrating the manner of assembling the segments of the device; and,

Figure i is a perspective view of one segment from which the spark arrester is constructed.

Referring now more specifically to the accompanying drawings, wherein like numerals designate similar parts throughout the various views, attention is directed first to Figure 1 wherein it] designates the upper portion of a chimney to which the spark arrester has been applied. This arrester which may be of any suitable material such for example as wire screening, metal lath, foram'inous sheet metal, or the like, rests upon the upper surface of the chimney Ill and is secured thereto by a means to be later described.

As shown in Figures 1, 3 and 4, the spark arrester which may be of any suitable shape but for convenience of illustration has been shown as being square or rectangular in cross section, consists of a plurality of segments, each of which includes a pair of angul'arly disposed side walls i2 and as of any desired size, shape and angular disposition, one of which walls is provided with an angle iron bed plate It attached securely to the lower end thereof. This bed plate provides a support by means of which the wall segment may rest upon the top of the chimney It in firm engagement therewith. Extending transversely from the bed plate [6, preferably from a point intermediate its extremities, is an anchoring member in the form of a strap or strip l8 of suitable material, pivoted to the bed plate as at 20, and which may conveniently be provided with a plurality of longitudinally spaced apertures 22 for the reception of any suitable fastening means, whereby the strap may be secured and attached to the side or top of a chimney as indicated in Figure 1.

Preferably secured to one of the side walls as I4, is a top section 24 of similar material and of any convenient size and shape. As will be seen from an inspection of Figures 1 and 3, each of the segments forms the corner and a pair of adjacent wall portions of the spark arrester cage. In assembling the device, it is 'merely necessary to lap a wall section it of one segment with a wall section [2 of an adjacent segment, and to secure the same by any suitable fastening means, as depicted in Figures 1 and 3. It should be here noted that in this assembly, the lapping sections may be caused to overlie each other to any desired extent, to thereby provide a wall or side of the complete spark arrester cage, of any desired length within the limits of the dimensions of the materials.

When so assembled, the wall section I2 at its lower end will be overlapped with the wall section it and the bed plate [6 attached thereto, whereby both sections i2 and it are attached to the plate for reinforcing and giving rigidity to the construction.

As shown in Figure 2, each of the top sections '24 overlies a portion of the top of the entire cage, and in order to insure a complete coverage thereof it will be noted that the sections overlap each other a varying extent, depending on the relative dimensions of the cage assembly. Any desired fastening means may be employed for securing the sections tops to each other, to complete the enclosure, this being noted at the tops or preferably hinged to the walls It as by ring hinges 26.

From the foregoing the manner of constructing and assembling the device will be readily understood. It will be seen that each of the identical segments can be assembled to produce a cage whose side walls may adjustably extend from the width of one segment wall section to nearly twice the same, depending on the extent of overlapping desired. At the same time, the top section 24 will overlap during extent to completely cover the top of the enclosure. The straps l8 may be bent at the desired point and secured to the side of the chimney as shown in Figure 1.

It is not intended to limit the invention to the exact construction shown and described, but all suitable modifications and equivalents may be resorted to falling within the scope of the ap pended claims.

Having described the invention, what is claimed as new is:

1. A chimney spark arrester comprising a screen cage for the opening of a chimney, said cage including a plurality of wall segments each including angularly disposed side wall sections having a top section hinged to the top of one o'ffsaid'side wall sections and a base plate secured t'oftlfie'bottom of'a side wall section, each side wall section'being secured to the side wall section of REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 946,874 'De Finance Jan. 18, 1910 1,854,160 Baird Apr. 12, 1932 2,017,732 Russell Oct. 15, 1935 

